Lock



Feb 14, 1933.

A. A. BRADsHAw 1,897,922

LOCK

Filed Feb. 2, 1.952 2 sheets-sheet 2 ATTQR N EY Patented Feb. 14, 1933lUNITED STATES PATENT; OFFICE AUSTIN A.

BRADSHAW, OF HICKORY, NORTH CAROLINA, ASSIGNOR OF ONE-HALF TQ J. A.BRADSHATV, OF BUNCOMBE COUNTY, NORTH CAROLINA Application led February23, 1932. Serial No. 594,715.

The object of the invention is to provide a lock which not only needs akey to effect the releasing operation but requires that the key shall beworked according to a specified combination before the lock may be movedto release position; to provide a lock of this kind in which thecombination may be changed to necessitate the operation of the key in acertain manner to release the lock; 'l0 and generally to provide a lockwhich, while apparently complicated in the process of unlocking, so thatit may be proof against release by unauthorized persons, is ofcomparatively simple form and, therefore, susceptible l5 of cheapmanufacture.

With this object in view, the invention consists in a construction andcombination of parts of which a preferred embodiment is illustrated inthe accompanying drawings but to which embodiment the invention is notto be restricted. Continued use in practice may suggest certain changesor alterations and the right is claimed to make any which fall with.

in the scope of the appended claims. In the drawings:

Figure 1 is a bottom plan view of a lock constructed in accordance withthe invention.

. Figure 2 is a sectional view on the plane indicated by the line 2-2 ofFigure l.

Figure 3 is a view similar to Figure 2 but taken on a line at rightangles to that in which Figure 2 is taken.

Figures 4 and 5 are sectional views on the planes indicated by the lines4 4 and 5-5 respectively of Figure 3.

Figure 6 is a view similar to Figure 4 but showing a different positionof the parts.

Figure 7 is a view partly in plan and partly in section looking at thelatch bar.

Figure 8 is a view similar to Figure 4 but showing still anotherposition.

Figure 9 is a collective perspective view of the several diskconstituting thecombination elements of the device.

Figure 10 is a perspective view of the nose end of the latch barengaging pawl.

Figure 11 is a View similar to Figure 10 but showing the upper end ofthe nose ofthe combination disk engaging pawl.

the key is withdrawn,

The latch bar 20 is mounted for rocking movement on a pivot stud 21which is carried by the transverse plate 22 of a yoke 23, the latterbeing connected with a base ;24 formed with a hub 25 in which thecylinder 55 26 is rotatably mounted, the cylinder being formed with akey slot 27 and having radial holes extending from-the key slot to theperiphery and carrying pins 28, which,'when the key 29a is inserted inthe key slot, are 60 forced radially outward and bring all of the pins29, which are mounted in correspondingly arranged holes in the hub, tothe'peripheral surface of the barrel, sothat the latter may be rotated.The pins 29 are spring pressed radially inward, sothat when they areprojected across into the mating holes inthe barrel which willpositively` preclude rotation of the same.

The barrel is formedv with a disk portion 30 seated in a counterbore inthe base andy suitably inscribed with' characters such as indicated at31, for registration with a mark 32 on the base, so that by rotation ofthe bar* 75.

rel `first in one direction and then in the other, according to aspecified arrangement of characters, may so result in positioning of thecombination disks that the latching bar may be released.

Rotatably mounted on the exterior of the hub are the disks 31,'32, 33and 34, suitable spacers, such asindicated at 35, being interposedbetween them. The lowermost on its upper face a pin, as 85 disk 3lcarries indicated at 36, and similar pins are mounted on the under andupper faces of the disks 32 and 33 and on the vunder side or face of thedisk 34. All of the pins are mounted on the disks at uniform radialdistances from the aXis of the barrel or hub, so that as one disk isturned, thepins are brought into abutting relation and this motiontransmitted to the' next disk and so on.

The uppermostdisk 34 is locked to the bar- '95 rel,'a cross-sectionallyangular stud 37 being inserted in a correspondingly formed socket orholev in the barrel and carrying a radially disposed'arm 38, having apin 39 whichis positionable in anyone of the holes 40 with lo@ betweenthe dogs which all of the disks are provided. The holes areinteriorlytln'eaded and the pins 36 are exteriorly threaded, so thatthey may be disposed in any selected holes. This for the purpose ofchanging the combination so that certain deiinite movements of thebarrel may be required to position all of the disks so that the notches41 may be brought into registration, those in the disks 31, 32 and 33being for the reception of the nose of the dog 42 and that in the disk34 for the reception of the nose of the dog 43 whichis pivotallymounted, as indicated at 44, on the under side of the latching bolt 20.The dog 43 is spring impelled toward the periphery of the disk 34. Aninterlocking connection 43 and 42 is provided in the form of. alatlugThe dog 42 is pivotally mounted on the base 24 as indicated at 47and isspring pressed toward the periphery ofthe disk.

The latching bar 20 is spring actuated as indicated at 48`to yieldinglyhold the same in obstructing position with reference to the shackleopenings in the casing 49 through which the shackle 50 is inserted to beengaged by the latching bolt, the inclined noses 51 resulting in thelatch bar being deflected against the pressure of the spring to engage v`the shackle with the latch bolt.

"the three disks,

Except when the notches 41 in the several disks are in registration, thenoses of theL pawls or dogs '42 and 43 bear on the peripheries of thedisks and the paWl 42 spanning may not enter the notch in either disksingly and the interlocking connection provided bythe lug 45 and slot 46precludes the dog 43 from entering the notch 'in the top disk when thelatter ypasses the nose of the dog. This sothat the dog 43 may Vnot beengaged with the Vnotch in its attend- `ant disk except when the dog 42may enter the notches in the remaining disks.

In the outer position where its nose bears on the periphery of itsassociated disk, the

dog 43 is disposed in obstructing relation to a post 52 carried by thebase 24. Being carried by the latching bar, the latter is positivelylprecluded from being accidentally turned because angular or turningmovement is then precluded by the post.

In the operation of the invention, it' the shackle is engaged with thelatching bar and the proper key 29a inserted, the latters shifting ofthe pins 28 and 29 will release the bar4 rel for rotation in the hub andbeing turned in one direction, will carry with it the disk 34 and laterthe disk 33when the pins 3G on the two engage, then later on the disk32and finally the disk 31. The pins having been set for a definitecombination, the barrel after a certain number of revolutions is stoppedwhen the desired ligure or indication 31 is opposite the mark 32, whichwill ymean that 45 on the former engaging seat notch 46 on the latter.

'ble by reason of the dog Voperation in the release the notch 41 in thelowermost disk 3l is opposite the nose or pawl of the dog 42. The barrelis then rotated in the opposite direction, the pins 36 on the disks 34,33 and 32 being engaged until this last disk is rotated posite directionthen follows to a definite po- "f sition of the disk 30, when the notchin the disk 33 will be positioned opposite the nose of the pawl'42. Butthis pawl, at that time, can not'fallinto the notches, because of theinterlocking connect-ion with the paWl oi dog 43. Therefore, the barrelis further rotated in the reverse direction than previously to positionthe notch 41 at a point where the nose of the dog 43 may enter it. Thuslthe noses of the two dogs drop into the notches in the several disksand the latch bar thenbecomes locked to the uppermost disk which islocked to the barrel through the arm 38 and its associated pin and ifthe barrel then be turned, the latch bai` will be swung around to aposition permitting release of the shackle, this turning movement beingpossi- 34 being out of obstructing position with reference to the post52. After the shackle has been released, the lock may be reset tolatching position by lrotating the barrel in the opposite direction fromwhich it was rotated in eliecting the last of the shackle, this movementof the barrel shifting the pawls out of engagement with the notches 41by reason ot the rounded edges of the noses of the pawls on the one sideand the inclination of the edges-ot the notches from radial lines on theone side. y

The invention having been described, what is claimed as new and usefulis:

1. A key actuated combination lock comprising a-latching'bar, arotatable barrel having a key slot therein, a plurality of rotatabledisks of which one is connected with the barrel, members carried 'by theseveral disks in obstructing relation to each other, so that rotation ofthe one disk by the barrel will result in the eventual rotation spanningall of the disks except that connected with the barrel, said diskshaving notches tor the reception of the nose of the doff, and having anose engageable in a notch formed in the barrel actuated disk, the lirstsaid dog being interconnected with the latching bar carried dog toprevent independent seating of the latter in said notch.

2. A key actuated combination lock coml` of all, a dogrj and aI dogcarried by the latching barl lill llt)

tation of the one disk by the barrel Will result in the eventualrotation ot all, a dog spanning all of the disks except that connectedwith the barrel, said disks having notches for the reception ot the noseof the dog, and a dog carried by the latching bar and having a noseengageable in a notch formed in the barrel actuated disk, the dogshaving interlocking connection to prevent the one from engaging itsnotch Without corresponding notch engagement by the other.

3. A key actuated combination lock comprising a. latching bar, arotatable barrel having a key slot therein, a plurality of rotatabledisks of Which one is connected With the barrel, members carried by theseveral disks in obstructing relation to each other, so that rotation ofthe one disk by the barrel Will result in the eventual rotation ot all,a dog spanning all of the disks except that connected with the. barrel,said disks having notches for the reception of the nose of the dog, anda dog carried by the latching bar and having a nose engageable in anotch formed in the barrel actuated disk, the dogs having interlockingconnection to prevent the one from engaging its notch Withoutcorresponding notch engagement by the other, the dogs having their nosesnormally in peripheral contact with the disks and spring pressed towardthe latter.

Il. A key actuated combination lock comprising a latching bar, arotatable barrel having a key slot therein, a plurality of rotatabledisks ot' which one is connected With the barrel, members carried by theseveral disks in obstructing relation to each other, so that rotation ofthe one disk by the barrel Will result in the eventual rotation ot all,a dog spanning all of the disks except that connected with the barrel,said disks having notches for the reception of the nose of the dog, anda dog carried by the latching bar and having a nose engageable in anotchrormed in the barrel actuated disk, and

mounting means for the barrel comprising a base, the barrel being formedWith a disk rotatable with respect to the base and inscribed Withindications registerable with a mark on the base.

5. A key actuated combination lock comprising a latching bar, arotatable barrel having a key slot therein, a plurality of rotatabledisks ot which one is connected with the barrel, members carried by theseveral disks in obstructing relation to each other, so that rotation otthe one disk by the barrel Will result in the eventual rotation of all,a dog spanning all of the disks except that connected With the barrel,said disks having notches for the reception of the nose of the dog, anda dog carried by the latching bar and having a nose engageable in anotch formed in the barrel actuated disk, the dogs having interlockingconnection to prevent the one from engaging its notch Withoutcorresponding notch engagement by the other, the dogs having their nosesnormally in peripheral contact With the disks and spring pressed towardthe latter, and a post disposed in obstructing relation to the latchingbar carried dog, except when the latter has its nose seated in the notchot its attendant disk.

6. A key actuated combination lock comprising a latching bar, arotatable barrel having a key slot therein, a plurality of rotatabledisks ot which one is connected With the barrel, members carried by theseveral disks in obstructing relation to each other, so that rotation ofthe one disk by the barrel will result in the eventual rotation of all,a dog spanning all of the disks except that connected with the barrel,said disks having notches for the reception of the nose of the dog, anda dog carried by the latching bar and having a. nose engageable in anotch formed in the barrel actuated disk, thel dogs having interlockingconnection to prevent the one from engaging its notch Withoutcorresponding notch engagement by the other, the dogs having their nosesnormally in peripheral contact With the disks and spring pressed towardthe latter, and a post disposed in obstructing relation to the latchingbar carried dog, except when the latter has its nose seated in the notchot its attendant disk, aY yoke on Which the latching bar is rotatablymounted, and a base supporting the yoke, said base having a hub in Whichsaid barrel is rotatably mounted and on which said disks are rotatablymounted.

In testimony whereof I affix my signature.

AUSTIN A. BRADSHAW.

